Docrates' henchmen deceived the Bronze Saints and stole the helm without setting Saori free. Seiya and Shun goes to the Colosseum while Shiryu and Kiki (who saw telephatically where the other missing pieces of the Gold Cloth were hidden) goes to the island where Ikki's challenge took place.
Docrates is in the Colosseum and will free Saori and Tatsumi if Seiya gives him the Gold Cloth's helm.